What is now referred to as the gender pay gap describes an old problem: the income gap between men and women. Although the gap has narrowed over the past 20 years, it still averages around 18 percent across Germany; however, there are regional differences. The pay gap can be explained both by pay gaps between different occupational groups and by a pay gap to the detriment of women within the individual occupations. On the one hand, women work more often than average in comparatively poorly paid jobs, such as salespeople, educators or nurses. Higher wages are paid, for example, in technical professions, where the proportion of men is traditionally high. But even if women work in the same profession as men, their salary often lags behind – according to the WSI wage index, it is 13 percent for industrial clerks, 10 percent for office clerks and 8 percent for electrical engineers. One reason for this is, among other things, the shorter working hours and career breaks of women due to part-time work and parental leave. By the way: The situation is different in companies and businesses that are bound by collective agreements: Collective agreements do not distinguish between men and women. They also ensure higher average salaries. The salary increase for electrical engineers with a collective agreement is around 18 percent. Calculated over the year, this results in a difference of 10,920 Euro in the basic salary alone – based on twelve monthly wages.